I was thinking about secrets, and pink things and the brain seemed the most mysterious of all the private things the body holds. The brain carries who we are and most of our dreams and thoughts and learning. It keeps, or doesn't, the secrets we have, both ours and other people's.
These are not the neurons that you think with, they are different brain cells. I saw an excellent poster of brain things, and these had a pleasing regularity to them.
I would like to point out that the canard that we use only 10% of our brain is dead wrong. For a while, doctors only understood what 10% of it did. Which is a very different statement. As we learn more about brains, we understand what more different parts are doing. So – please, the next time someone suggests we use only 10% of our brains, set them straight!